US20030173198A1 - Illuminated button switch - Google Patents
Illuminated button switch Download PDFInfo
- Publication number
- US20030173198A1 US20030173198A1 US10/332,443 US33244303A US2003173198A1 US 20030173198 A1 US20030173198 A1 US 20030173198A1 US 33244303 A US33244303 A US 33244303A US 2003173198 A1 US2003173198 A1 US 2003173198A1
- Authority
- US
- United States
- Prior art keywords
- push button
- light
- board
- switch
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/18—Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks
- H01H2009/186—Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks using an electroluminiscent panel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/002—Legends replaceable; adaptable
- H01H2219/018—Electroluminescent panel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/002—Legends replaceable; adaptable
- H01H2219/018—Electroluminescent panel
- H01H2219/02—Electroluminescent panel programmable
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/028—Printed information
- H01H2219/03—Printed information in transparent keyboard
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/054—Optical elements
- H01H2219/062—Light conductor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2221/00—Actuators
- H01H2221/07—Actuators transparent
Definitions
- the present invention relates to a illumination type push button switch used in an electronic apparatus, such as a portable telephone or a personal computer.
- FIG. 5 is a sectional view of the conventional illumination type push button switch.
- Dark-colored push button 1 made of insulating resin includes, at its top surface, display part 1 A which is, for example, semitransparent or milk-white and is exposed in the form of a letter, a mark, a design or the like.
- Switch contact 2 disposed below button 1 includes wiring board 3 , flexible insulating film 4 , insulating spacers 5 each having both surfaces coated with adhesive for bonding wiring board 3 and insulating film 4 together, plural fixed contacts 3 A on a top surface of wiring board 3 , and plural movable contacts 4 A on a bottom surface of insulating film 4 .
- Fixed and movable contacts 3 A and 4 A face each other at a predetermined space.
- Switch contact 2 thus functions as a membrane switch.
- Light-emitting diode (LED) 6 is mounted on the top surface of wiring board 3 near fixed contact 3 A. Insulating film 4 and insulating spacer 5 have respective holes through which LED 6 is inserted.
- Board 7 is mounted on a bottom surface of wiring board 3 . Case 8 made of insulating resin covers these elements and has, at its top side, a hole through which button 1 projects vertically movably. The illumination type push button switch is thus configured.
- a push button switch includes a push button, a switch contact for establishing electrical connection and disconnection when the push button is pressed and released, a board mounted to the switch contact to face the push button across the switching contact, and an EL element mounted to a substrate to face the switch contact across the substrate.
- the board has a through-hole formed therein near the switch contact.
- the EL element includes a light-emitting part including a light-transmitting electrode layer, a luminescent layer, and a back electrode layer overlaid.
- FIG. 1 is a sectional view of a illumination type push button switch in accordance with an exemplary embodiment of the present invention.
- FIG. 2 is a sectional view of an EL element of the illumination type push button switch in accordance with the embodiment.
- FIG. 3 is a sectional view of another EL element of the illumination type push button switch in accordance with the embodiment.
- FIG. 4 is a sectional view of another illumination type push button switch in accordance with the embodiment.
- FIG. 5 is a sectional view of a conventional illumination type push button switch.
- FIGS. 1 to 4 An exemplary embodiment of the present invention will be described with reference to FIGS. 1 to 4 . It is to be noted that elements similar to those in the prior art are denoted by the same reference numerals and will not be described in detail.
- FIG. 1 is a sectional view of a illumination type push button switch in accordance with the exemplary embodiment of the present invention.
- Dark-colored push buttons 11 and 12 made of insulating resin, such as ABS resin, polycarbonate, or acrylic resin, include display parts 11 A, 12 A which are, for example, semitransparent or milk-white at their top surfaces, respectively, and are exposed in the form of a letter, a mark, a design or the like.
- Switch contact 2 below push button 11 includes wiring board 3 , flexible insulating film 4 , and insulating spacers 5 each having both surfaces coated with adhesive for bonding wiring board 3 and insulating film 4 together.
- This arrangement allows switch contact 2 to function as a membrane switch.
- Board 17 made of aluminum, insulating resin, or the like is mounted to a bottom surface of wiring board 3 and has plural through-holes 17 A and 17 B formed therein around and between fixed contacts 3 A.
- EL element 20 is mounted to a bottom surface of board 17 .
- a bottom surface of light-transmitting substrate 21 formed of a film, glass, resin or the like is overlaid with light-transmitting electrode layer 22 formed by sputtering or a method using an electron beam, or by printing light-transmitting synthetic resin.
- the resin includes indium tin oxide or the like dispersed therein.
- Electrode layer 22 ends before an outer periphery of substrate 21 .
- Electrode layer 22 is overlaid by printing with luminescent layer 23 made of synthetic resin including light-emitting material, such as zinc sulfide dispersed therein, dielectric layer 24 made of synthetic resin including barium titanate or the like dispersed therein, and back electrode layer 25 made of resin including silver or carbon.
- Luminescent layer 23 , dielectric layer 24 , and back electrode layer 25 are covered with insulating layer 26 made of epoxy resin, polyester resin or the like.
- Case 8 made of insulating resin covers EL element 20 , switch contact 2 , board 17 , and others. Case 8 has, at its top side, a hole through which push button 11 projects vertically movably.
- luminescent layer 23 between layers 22 and 25 emits light.
- the light passes through through-holes 17 A, 17 B and back-lights the push buttons 11 and 12 , thus facilitating the identification of buttons 11 , 12 even in dark.
- EL element 20 may be positioned between push buttons 11 , 12 and switching contact 2 or between switching contact 2 and board 17 .
- An alternating-current voltage of several tens of voltages is preferably applied to EL element 20 , while switch contact 2 operates with a DC voltage of several voltages. For this reason, upon being located over or below switch contact 2 , EL element 20 must be distanced from switch contact 2 or must be shielded for preventing the contact from noise or the like.
- EL element 20 capable of lighting the push buttons simultaneously with surface-light emission unlike an LED is mounted to the bottom surface of board 17 and emits the light via through-holes 17 A and 17 B of board 17 to push buttons 11 and 12 .
- the push buttons illuminate clearly, and the illumination type push button switch employs a small number of components and is inexpensive.
- the switching contact including fixed contacts 3 A on the top surface of wiring board 3 , movable contacts 4 A on the bottom surface of insulating film 4 may be made of, for example, transparent resin including silver, carbon, or the like dispersed therein so as to transmit the light. This allows push buttons 11 and 12 to illuminate more brightly.
- the EL element may includes plural partial light-emitting parts 27 A and 27 B including plural partial back electrode layers 25 A, 25 B which are formed at parts, respectively, instead of being formed over the whole surface.
- This arrangement allows the switch of the present embodiment to perform various lighting, for example, to light a specified push button and to light all the push buttons simultaneously.
- the switch may partly include plural partial light-transmitting electrode layers 22 or partial luminescent layers which emit light in different colors.
- plural partial back electrode layers 25 A and 25 B may transmit light and may be overlaid with luminescent layer 28 which emits light in color different from respective colors of luminescent layer 23 , dielectric layer 29 , and back electrode layers 30 A and 30 B.
- luminescent layer 28 which emits light in color different from respective colors of luminescent layer 23 , dielectric layer 29 , and back electrode layers 30 A and 30 B.
- a voltage being applied between light-transmitting electrode layer 22 and any one of partial back electrode layers 25 A and 25 B a corresponding part of luminescent layer 23 emits light.
- a corresponding part of luminescent layer 28 emits light.
- luminescent layers 23 and 28 Upon a voltage being applied between all these electrode layers, luminescent layers 23 and 28 emit light in different colors, and then, push buttons 11 and 12 can illuminate with a combination of these lights of different colors.
- the EL element which emits light in different colors, increases variety of lighting.
- the light to be emitted can be changed between the different colors, and thus, the push button can illuminate with the combination of the lights of different colors.
- board 17 is mounted to the bottom surface of the membrane switch including wiring board 3 and insulating film 4 that are put together.
- board 31 made of paper phenol, epoxy including glass therein or the like may have plural fixed contacts 31 A on its top surface and have through-holes 31 B formed therein near fixed contacts 31 A.
- Board 31 may be affixed to insulating film 4 , which has movable contacts 4 A formed on its bottom surface via insulating spacers 5 .
- the switching contact may be, for example, a switch including movable contacts that are made of resilient metallic foil and have center portions protruding like a dome, and fixed contacts on the wiring board.
- the movable contact is turned inside out with the push button for connection with and disconnection from the fixed contact.
- the switch contact may include dome-like movable contacts made of rubber or elastomer for connection with and disconnection from respective fixed contacts.
- the contact may be a single push switch.
- an inexpensive illumination type push button switch including a small number of components and lighting a push button clearly is provided.
Abstract
Description
- The present invention relates to a illumination type push button switch used in an electronic apparatus, such as a portable telephone or a personal computer.
- Recently, electronic apparatuses including a portable telephone and a personal computer have better functions and cover a broader spectrum. Push button switches used in an operating part of the apparatuses are required to light a push button for illuminating to enable an operation even in dark.
- The conventional illumination type push button switch will be described with reference to FIG. 5.
- FIG. 5 is a sectional view of the conventional illumination type push button switch. Dark-
colored push button 1 made of insulating resin includes, at its top surface, displaypart 1A which is, for example, semitransparent or milk-white and is exposed in the form of a letter, a mark, a design or the like. Switchcontact 2 disposed belowbutton 1 includeswiring board 3,flexible insulating film 4,insulating spacers 5 each having both surfaces coated with adhesive for bondingwiring board 3 and insulatingfilm 4 together, pluralfixed contacts 3A on a top surface ofwiring board 3, and pluralmovable contacts 4A on a bottom surface ofinsulating film 4. Fixed andmovable contacts contact 2 thus functions as a membrane switch. Light-emitting diode (LED) 6 is mounted on the top surface ofwiring board 3 near fixedcontact 3A. Insulatingfilm 4 andinsulating spacer 5 have respective holes through whichLED 6 is inserted.Board 7 is mounted on a bottom surface ofwiring board 3.Case 8 made of insulating resin covers these elements and has, at its top side, a hole through whichbutton 1 projects vertically movably. The illumination type push button switch is thus configured. - When specified
push button 1 is pressed downward, insulatingfilm 4 is pressed bypush part 1B and sags, thereby allowing correspondingmovable contact 4A on the bottom surface of thisfilm 4 to contact with correspondingfixed contact 3A on the top surface ofwiring board 3. This action allowsswitch contact 2 to establish electrical connection and disconnection. - When
LED 6 on the top surface ofwiring board 3 emits light, displaypart 1A ofpush button 1 overLED 6 illuminates from behind with the light, which thus facilitates the identification ofbutton 1 even in dark. - In the conventional push button switch described above, since
LED 6 has light emission directivity, the light emitted byLED 6 lights displaypart 1A ofpush button 1 weak ifdisplay part 1A is in a position out of alignment withLED 6. Further, ifmany push buttons 1 are arranged, the number ofLEDs 6 must be equal to the number ofbuttons 1. This increases the number of components, and further, it takes time, for example, to make the holes in insulatingfilm 4 and insulatingspacers 5 and to mountLEDs 6 towiring board 3. This makes the conventional push button switch expensive accordingly. - A push button switch includes a push button, a switch contact for establishing electrical connection and disconnection when the push button is pressed and released, a board mounted to the switch contact to face the push button across the switching contact, and an EL element mounted to a substrate to face the switch contact across the substrate. The board has a through-hole formed therein near the switch contact. The EL element includes a light-emitting part including a light-transmitting electrode layer, a luminescent layer, and a back electrode layer overlaid.
- FIG. 1 is a sectional view of a illumination type push button switch in accordance with an exemplary embodiment of the present invention.
- FIG. 2 is a sectional view of an EL element of the illumination type push button switch in accordance with the embodiment.
- FIG. 3 is a sectional view of another EL element of the illumination type push button switch in accordance with the embodiment.
- FIG. 4 is a sectional view of another illumination type push button switch in accordance with the embodiment.
- FIG. 5 is a sectional view of a conventional illumination type push button switch.
- An exemplary embodiment of the present invention will be described with reference to FIGS.1 to 4. It is to be noted that elements similar to those in the prior art are denoted by the same reference numerals and will not be described in detail.
- FIG. 1 is a sectional view of a illumination type push button switch in accordance with the exemplary embodiment of the present invention. Dark-
colored push buttons display parts contact 2 belowpush button 11 includeswiring board 3,flexible insulating film 4, andinsulating spacers 5 each having both surfaces coated with adhesive for bondingwiring board 3 and insulatingfilm 4 together. Pluralfixed contacts 3A on a top surface ofwiring board 3 and pluralmovable contacts 4A on a bottom surface of insulatingfilm 4 face each other at a predetermined space. This arrangement allowsswitch contact 2 to function as a membrane switch.Board 17 made of aluminum, insulating resin, or the like is mounted to a bottom surface ofwiring board 3 and has plural through-holes fixed contacts 3A.EL element 20 is mounted to a bottom surface ofboard 17. - In
EL element 20, a bottom surface of light-transmittingsubstrate 21 formed of a film, glass, resin or the like is overlaid with light-transmittingelectrode layer 22 formed by sputtering or a method using an electron beam, or by printing light-transmitting synthetic resin. The resin includes indium tin oxide or the like dispersed therein.Electrode layer 22 ends before an outer periphery ofsubstrate 21.Electrode layer 22 is overlaid by printing withluminescent layer 23 made of synthetic resin including light-emitting material, such as zinc sulfide dispersed therein,dielectric layer 24 made of synthetic resin including barium titanate or the like dispersed therein, andback electrode layer 25 made of resin including silver or carbon.Luminescent layer 23,dielectric layer 24, andback electrode layer 25 are covered withinsulating layer 26 made of epoxy resin, polyester resin or the like. -
Case 8 made of insulating resin coversEL element 20,switch contact 2,board 17, and others.Case 8 has, at its top side, a hole through whichpush button 11 projects vertically movably. - When specified
push button insulating film 4 is pressed bypush part 11B or 12B and sags, thereby allowing correspondingmovable contact 4A on the bottom surface offilm 4 to contact with correspondingfixed contact 3A on the top surface ofwiring board 3. This action allowsswitch contact 2 to establish electrical connection and disconnection. - Upon a voltage being applied between light-transmitting
electrode layer 22 andback electrode layer 25 ofEL element 20,luminescent layer 23 betweenlayers holes push buttons buttons -
EL element 20 may be positioned betweenpush buttons contact 2 or between switchingcontact 2 andboard 17. An alternating-current voltage of several tens of voltages is preferably applied toEL element 20, whileswitch contact 2 operates with a DC voltage of several voltages. For this reason, upon being located over or below switchcontact 2,EL element 20 must be distanced fromswitch contact 2 or must be shielded for preventing the contact from noise or the like. - In case that
EL element 20 is mounted to the bottom surface ofboard 17 according to the present embodiment, althoughboard 17 has through-holes EL element 20 which do not correspond to through-holes board 17. This ensures a distance corresponding to the thickness ofboard 17 at through-holes - According to the present embodiment described above,
EL element 20 capable of lighting the push buttons simultaneously with surface-light emission unlike an LED is mounted to the bottom surface ofboard 17 and emits the light via through-holes board 17 to pushbuttons - The switching contact including
fixed contacts 3A on the top surface ofwiring board 3,movable contacts 4A on the bottom surface ofinsulating film 4 may be made of, for example, transparent resin including silver, carbon, or the like dispersed therein so as to transmit the light. This allowspush buttons - As shown in FIG. 2, the EL element may includes plural partial light-emitting
parts back electrode layers - Instead of partial
back electrode layers electrode layers 22 or partial luminescent layers which emit light in different colors. - As shown in FIG. 3, plural partial
back electrode layers luminescent layer 28 which emits light in color different from respective colors ofluminescent layer 23,dielectric layer 29, andback electrode layers electrode layer 22 and any one of partialback electrode layers luminescent layer 23 emits light. Upon voltage being applied between any one of partial back electrode layers 25A, 25B and corresponding one of partial back electrode layers 30A, 30B, a corresponding part ofluminescent layer 28 emits light. - Upon a voltage being applied between all these electrode layers,
luminescent layers buttons - As described above, the EL element, which emits light in different colors, increases variety of lighting. For example, the light to be emitted can be changed between the different colors, and thus, the push button can illuminate with the combination of the lights of different colors.
- In the above description,
board 17 is mounted to the bottom surface of the membrane switch includingwiring board 3 and insulatingfilm 4 that are put together. As shown in a sectional view of FIG. 4,board 31 made of paper phenol, epoxy including glass therein or the like may have plural fixedcontacts 31A on its top surface and have through-holes 31B formed therein near fixedcontacts 31A.Board 31 may be affixed to insulatingfilm 4, which hasmovable contacts 4A formed on its bottom surface via insulatingspacers 5. - Instead of the membrane switch, the switching contact may be, for example, a switch including movable contacts that are made of resilient metallic foil and have center portions protruding like a dome, and fixed contacts on the wiring board. In this switch, the movable contact is turned inside out with the push button for connection with and disconnection from the fixed contact. The switch contact may include dome-like movable contacts made of rubber or elastomer for connection with and disconnection from respective fixed contacts. The contact may be a single push switch.
- According to the present invention, an inexpensive illumination type push button switch including a small number of components and lighting a push button clearly is provided.
Claims (4)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001149088A JP2002343187A (en) | 2001-05-18 | 2001-05-18 | Illuminated push-button switch |
JP2001-149088 | 2001-05-18 | ||
JP2001149088 | 2001-05-18 | ||
PCT/JP2002/004683 WO2002095778A1 (en) | 2001-05-18 | 2002-05-15 | Illuminated button switch |
Publications (2)
Publication Number | Publication Date |
---|---|
US20030173198A1 true US20030173198A1 (en) | 2003-09-18 |
US6670565B2 US6670565B2 (en) | 2003-12-30 |
Family
ID=18994303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/332,443 Expired - Fee Related US6670565B2 (en) | 2001-05-18 | 2002-05-15 | Illuminated button switch |
Country Status (5)
Country | Link |
---|---|
US (1) | US6670565B2 (en) |
JP (1) | JP2002343187A (en) |
CN (1) | CN1463457A (en) |
TW (1) | TWI277110B (en) |
WO (1) | WO2002095778A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050139460A1 (en) * | 2003-12-25 | 2005-06-30 | Polymatech Co., Ltd. | Key sheet |
EP1720048A1 (en) | 2005-05-03 | 2006-11-08 | Delphi Technologies, Inc. | Illuminated display system |
EP2071601A1 (en) | 2007-12-14 | 2009-06-17 | Research In Motion Limited | Key in a Keypad of an Electronic Device Providing Feedback |
US20090153491A1 (en) * | 2007-12-14 | 2009-06-18 | Research In Motion Limited | Key in a keypad of an electronic device providing feedback |
US20120112933A1 (en) * | 2010-11-10 | 2012-05-10 | Research In Motion Limited | Keyboard |
US20150213975A1 (en) * | 2014-01-28 | 2015-07-30 | Wistron Corporation | Switch device |
EP2066976B1 (en) * | 2006-09-12 | 2017-10-18 | LG Electronics Inc. | Cooking apparatus |
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KR100404102B1 (en) * | 2001-09-04 | 2003-11-03 | 엘지전자 주식회사 | Devise of keypad back lighting for mobile pone |
US7009121B2 (en) * | 2002-04-25 | 2006-03-07 | Preh-Werke Gmbh & Co. Kg | Keyboard, especially for electronic payment terminals, and keypad |
JP2004087203A (en) * | 2002-08-23 | 2004-03-18 | Sanyo Electric Co Ltd | Keys input device and portable telephone equipped therewith |
TWI220213B (en) * | 2003-03-04 | 2004-08-11 | Darfon Electronics Corp | Keyboard structure |
KR100485903B1 (en) * | 2004-02-10 | 2005-04-29 | 한성엘컴텍 주식회사 | El for key pad with esd prevention layer |
GB0403854D0 (en) * | 2004-02-20 | 2004-03-24 | Pelikon Ltd | Switches |
JP4432671B2 (en) * | 2004-03-01 | 2010-03-17 | パナソニック株式会社 | Illumination device |
DE102004013821A1 (en) * | 2004-03-20 | 2005-10-06 | Volkswagen Ag | Foil keypad for use in an automobile has an electroluminescent foil with a pressure sensitive foil |
JP2006313709A (en) * | 2005-05-09 | 2006-11-16 | Hosiden Corp | El illumination type switch |
JP2007157384A (en) * | 2005-12-01 | 2007-06-21 | Kojima Press Co Ltd | Sheet switch |
JP2008270023A (en) * | 2007-04-23 | 2008-11-06 | Tokai Rika Co Ltd | Switch equipped with touch sensor |
US7723626B2 (en) * | 2007-05-19 | 2010-05-25 | Visteon Global Technologies, Inc. | Haptics cone |
CN101256911B (en) * | 2008-04-11 | 2012-06-06 | 精模电子科技(深圳)有限公司 | Luminous keyboard with light conducting plate |
JP5345965B2 (en) * | 2010-02-24 | 2013-11-20 | レノボ・シンガポール・プライベート・リミテッド | Keyboard device |
CN103578831B (en) * | 2012-08-09 | 2016-07-06 | 光宝电子(广州)有限公司 | Pressure type backlight button structure |
JP6881049B2 (en) * | 2017-06-08 | 2021-06-02 | Smk株式会社 | Light emitting element with touch sensor |
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- 2002-05-15 US US10/332,443 patent/US6670565B2/en not_active Expired - Fee Related
- 2002-05-15 WO PCT/JP2002/004683 patent/WO2002095778A1/en active Application Filing
- 2002-05-16 TW TW091110246A patent/TWI277110B/en not_active IP Right Cessation
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US4489227A (en) * | 1984-01-11 | 1984-12-18 | Sheldahl, Inc. | Back lighted, full travel push button membrane keyboard |
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Cited By (12)
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US20050139460A1 (en) * | 2003-12-25 | 2005-06-30 | Polymatech Co., Ltd. | Key sheet |
US7034235B2 (en) * | 2003-12-25 | 2006-04-25 | Polymatech Co., Ltd. | Key sheet |
EP1720048A1 (en) | 2005-05-03 | 2006-11-08 | Delphi Technologies, Inc. | Illuminated display system |
US20060250813A1 (en) * | 2005-05-03 | 2006-11-09 | Raymond Lippmann | Illuminated display system |
US7350934B2 (en) | 2005-05-03 | 2008-04-01 | Delphi Technologies, Inc. | Illuminated display system |
EP2066976B1 (en) * | 2006-09-12 | 2017-10-18 | LG Electronics Inc. | Cooking apparatus |
EP2071601A1 (en) | 2007-12-14 | 2009-06-17 | Research In Motion Limited | Key in a Keypad of an Electronic Device Providing Feedback |
US20090153491A1 (en) * | 2007-12-14 | 2009-06-18 | Research In Motion Limited | Key in a keypad of an electronic device providing feedback |
US20120112933A1 (en) * | 2010-11-10 | 2012-05-10 | Research In Motion Limited | Keyboard |
US8926201B2 (en) * | 2010-11-10 | 2015-01-06 | Blackberry Limited | Keyboard with flexible printed circuit defining a plurality of venting holes |
US20150213975A1 (en) * | 2014-01-28 | 2015-07-30 | Wistron Corporation | Switch device |
US9583287B2 (en) * | 2014-01-28 | 2017-02-28 | Wistron Corporation | Switch device |
Also Published As
Publication number | Publication date |
---|---|
JP2002343187A (en) | 2002-11-29 |
US6670565B2 (en) | 2003-12-30 |
WO2002095778A1 (en) | 2002-11-28 |
CN1463457A (en) | 2003-12-24 |
TWI277110B (en) | 2007-03-21 |
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